7.20.1 Top new questions this week

7.20.1.1 Fragile commands in 2021
7.20.1.2 In math mode, how do I make the fraction bar "invisible"?
7.20.1.3 Why doesn't TeX have hkern and vkern?
7.20.1.4 selnolig-package and round s (s:) in fraktur (yfonts)
7.20.1.5 emshape undefined
7.20.1.6 Vector Align amsmath isn't working as intended. Is there another way than using the and '&' sign?
7.20.1.7 Fill a tabular from a key value command
7.20.1.1 Fragile commands in 2021

https://tex.stackexchange.com/landing/r/digest?cta=question&id=588674

Since 2015, \( \), \begin{math} etc. have been made robust. Aside from user-generated commands not created with \DeclareRobustCommand and out-of-date packages, are fragile commands still a thing in ... 
[macros] [fragile]
 
asked by Don Hosek https://tex.stackexchange.com/landing/r/digest?cta=user&id=202780 23 votes
answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 15 votes
7.20.1.2 In math mode, how do I make the fraction bar "invisible"?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=589142

I am trying to typeset a "fraction" without the fraction bar.  I have tried to do this using the genfrac, but as in the example below, the numerator and denominator in genfrac are farther ... 
[amsmath] [fractions]
 
asked by Andrew https://tex.stackexchange.com/landing/r/digest?cta=user&id=15622 10 votes
answered by Marijn https://tex.stackexchange.com/landing/r/digest?cta=user&id=89417 6 votes
7.20.1.3 Why doesn't TeX have hkern and vkern?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=590315

We have \hskip, \vskip, and \mskip, but only \kern and \mkern. Why doesn't TeX distinguish between horizontal and vertical kerns like it does for skips? 
[tex-core]
 
asked by RobertR https://tex.stackexchange.com/landing/r/digest?cta=user&id=202281 9 votes
answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 10 votes
7.20.1.4 selnolig-package and round s (s:) in fraktur (yfonts)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=589126

In a German document I would like to typeset some selected phrases in Fraktur while the rest is written in Linux Libertine. Using the yfonts-package, the round s (the 'modern' one as opposed to the ... 
[selnolig] [yfonts]
 
asked by Gylfi https://tex.stackexchange.com/landing/r/digest?cta=user&id=218767 7 votes
answered by Jasper Habicht https://tex.stackexchange.com/landing/r/digest?cta=user&id=47927 7 votes
7.20.1.5 emshape undefined

https://tex.stackexchange.com/landing/r/digest?cta=question&id=589116

In the following example the line \renewcommand\emshape works fine on one Linux computer using Kile but has to be commented out on another Linux computer also using Kile. 
There are not other ... 
[fontspec]
 
asked by Richard https://tex.stackexchange.com/landing/r/digest?cta=user&id=238445 7 votes
answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 4 votes
7.20.1.6 Vector Align amsmath isn't working as intended. Is there another way than using the and '&' sign?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=590497

I am only trying to have each element aligned with the associated symbol from Eq. 1. 
Sorry if the question is too obvious. I tried looking at other examples, but non had the exact same issue as me. 
\... 
[equations] [align] [vector]
 
asked by johnny_1010 https://tex.stackexchange.com/landing/r/digest?cta=user&id=237352 6 votes
answered by campa https://tex.stackexchange.com/landing/r/digest?cta=user&id=82917 4 votes
7.20.1.7 Fill a tabular from a key value command

https://tex.stackexchange.com/landing/r/digest?cta=question&id=588724

I'd like to build a tabular from a command with keys/values, values being themselves a set of keys/values (or a list). 
If the key is not defined, no entry added in the tabular. 
For now here is what I ... 
[tables] [key-value]
 
asked by NBur https://tex.stackexchange.com/landing/r/digest?cta=user&id=151808 6 votes
answered by Skillmon https://tex.stackexchange.com/landing/r/digest?cta=user&id=117050 3 votes